JP2017024751A - Bag-making packaging machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bag-making packaging machine capable of improving production efficiency of a continuous packaging bag.SOLUTION: A bag-making packaging machine 10 comprises: a pull-down belt mechanism 23 for sending a film F; a lateral seal device 30 for performing seal area formation operation for forming lateral seal areas S on the film F; and a control part 50 for controlling operations of the pull-down belt mechanism 23 and the lateral seal device 30. The control part 50 controls the operation of the lateral seal device 30 so as to perform the seal area formation operation at an interval of a first period T1 when a bag B is formed on the film F by forming the lateral seal areas S on the film F so as to be separated by first distance L1 in a sending direction D, and the control part 50 controls the operation of the lateral seal device 30 so as to perform the seal area formation operation at an interval of a second period T2 shorter than the first period T1, when a header H is formed on the film F by forming the lateral seal areas S on the film F so as to be separated by second distance L2 in the sending direction D.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a bag making and packaging machine.

  As a bag making and packaging machine that manufactures a continuous bag having a plurality of bags containing articles and a header, a film feeding section for sending a tubular film, and a seal area is formed on the film sent by the film feeding section 2. Description of the Related Art A bag making and packaging machine including a sealing region forming unit that performs a sealing region forming operation is known (for example, see Patent Document 1).

Japanese Patent No. 4834637

  In the bag making and packaging machine as described above, it is desired to shorten the time required for manufacturing the continuous bag (the manufacturing time of the continuous bag) and improve the manufacturing efficiency of the continuous bag.

  An object of this invention is to provide the bag making packaging machine which can improve the manufacture efficiency of a continuous-packing bag.

  A bag making and packaging machine according to the present invention is a bag making and packaging machine for producing a continuous bag having a plurality of bags containing articles and a header, and a film feeding unit for feeding a tubular film; A seal region forming unit that performs a seal region forming operation for forming a seal region on a film fed by a film feeding unit, and a control unit that controls the operation of the film feeding unit and the operation of the seal region forming unit, and forming a seal region The part forms a bag in the film by forming a sealing region on the film so as to be separated by a first distance in the film feeding direction, and the sealing region is formed on the film so as to be separated by a second distance shorter than the first distance in the feeding direction. When the header is formed on the film by forming the seal region on the film so as to be separated from the first distance in the feeding direction, the control unit is configured to be at the interval of the first period. When the operation of the seal region forming portion is controlled so as to perform the roll region forming operation and the seal region is formed on the film so as to be separated from the second distance in the feeding direction, the interval of the second period shorter than the first period The operation of the seal region forming unit is controlled so as to perform the seal region forming operation.

  In this bag making and packaging machine, the control unit controls the operation of the seal region forming unit so that the second period is shorter than the first period. The header formation time is shortened. As a result, the manufacturing time of the entire continuous bag can be shortened, so that the manufacturing efficiency of the continuous bag can be improved.

  In addition, the control unit controls the operation of the film feeding unit so that the film feeding and the film stopping are repeated, and when the film is stopped, the sealing region forming unit performs the sealing region forming operation. The operation may be controlled. In this case, the formation of the seal region may be performed by performing the seal region forming operation on the stopped film. Therefore, it is possible to reliably form the seal region with a simple configuration.

  In addition, when the film is fed in each of the first period and the second period, the control unit may control the operation of the film feeding unit so that the film feeding is started at the same acceleration. In this case, since the acceleration setting for film feeding can be made common, the program in the control unit can be simplified.

  Each of the first period and the second period includes a feeding period in which the film feeding unit feeds the film, and a stopping period in which the film feeding unit stops the film, and the control unit in the second period The operation of the film feeding unit may be controlled so that the feeding period is shorter than the feeding period in the first period. In this case, since it is not necessary to shorten the stop period in which the film feeding section stops the film in the second period, the second period can be shortened while maintaining the formation of a reliable seal region.

  Each of the first period and the second period includes an operation period in which the seal region forming unit performs a seal region forming operation and a standby period in which the seal region forming unit waits. You may control operation | movement of a seal | sticker area | region formation part so that a waiting period may become shorter than the waiting period in a 1st period. In this case, since it is not necessary to shorten the operation period in which the seal region forming unit performs the seal region forming operation in the second period, it is possible to shorten the second period while maintaining the reliable formation of the seal area.

  According to the present invention, it is possible to improve the manufacturing efficiency of the continuous bag.

It is a side view of the continuous packaging system containing the bag making packaging machine of one Embodiment of this invention. (A) is a top view of the horizontal seal | sticker apparatus in an operation | movement period. (B) is a top view of a horizontal seal device in a waiting period. It is a block diagram of the continuous packaging system of FIG. It is a figure which shows the manufacturing process of a continuous bag. (A) is a timing chart which shows an example of operation | movement of the pull-down belt mechanism and side seal apparatus of the bag making packaging machine of FIG. (B) is a timing chart which shows the comparative example of operation | movement of a pull-down belt mechanism and a horizontal sealing apparatus.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the description of the drawings, the same or equivalent elements will be denoted by the same reference numerals, and redundant description will be omitted.

  As shown in FIG. 1, the continuous packaging system 1 includes a bag making and packaging machine 10 and a combination weighing device 100. In the continuous packaging system 1, the article A is weighed by the combination weighing device 100, and the article A is accommodated in a plurality of bags B by the bag making and packaging machine 10 to produce a product (continuous packaging bag) G. In the continuous packaging system 1, for example, the articles A weighed so that the entire product G has a predetermined target value are stored in each bag B.

[Product G]
As shown in FIG. 4, the commodity G is a continuous bag having a plurality of bags B in which the article A is accommodated and a header H. The product G is composed of a plurality of (in this case, four) bags B provided continuously and a header H provided on one end side of the plurality of bags B. In the header H, the article A is not accommodated, and a through hole P for suspending the commodity G is provided. A lateral seal region S is formed between the adjacent bags B and B and between the adjacent bags B and the header H. In each horizontal seal region S, a cut (perforation) C is formed.

[Configuration and Operation of Combination Weighing Device 100]
As shown in FIG. 1, the combination weighing device 100 includes an article supply chute 101, a dispersion table 102, a plurality of radiation feeders 103, a plurality of pool hoppers 104, a plurality of weighing hoppers 105, and a collective discharge chute unit. 106 and a timing hopper 107. The combination weighing apparatus 100 is continuously supplied with an article A, which is, for example, food by the cross feeder CF.

  The article A continuously supplied by the cross feeder CF is put into the article supply chute 101. The article supply chute 101 supplies the article A to the dispersion table 102. The dispersion table 102 supplies the article A to the plurality of radiating feeders 103 disposed around the table while dispersing the article A. Each radiating feeder 103 supplies the article A to the pool hopper 104 arranged so as to correspond to each radiating feeder 103. Each pool hopper 104 supplies the article A to the weighing hopper 105 arranged so as to correspond to each pool hopper 104.

  In the combination weighing device 100, the combination weighing calculation is performed based on the measurement value of the article A in the weighing hopper 105, and the combination of the article A whose result of the combination weighing calculation is within the predetermined allowable range and closest to the target value is obtained. Selected. Then, the articles A in the weighing hopper 105 included in the selected combination are supplied to the timing hopper 107 via the collective discharge chute unit 106. The timing hopper 107 supplies the article A to the bag making and packaging machine 10 at a predetermined timing.

[Configuration of Bag Making and Packaging Machine 10]
The bag making and packaging machine 10 includes a film supply mechanism 21, a former 22, a pull-down belt mechanism (film feeding unit) 23, a vertical sealing device 24, and a horizontal sealing device (sealing region forming unit) 30. . The film supply mechanism 21 supports the original roll of the film F and feeds the belt-like film F. The former 22 has a sailor 22a and a tube 22b. The sailor 22a and the tube 22b guide the folded film F so as to be folded, and overlap both edges of the film F in the width direction. That is, the former 22 forms the film F into a cylindrical shape. The pull-down belt mechanism 23 feeds the film F formed in a cylindrical shape along the center line direction of the cylinder (hereinafter referred to as “feeding direction D”) while pressing the film F against the tube 22b.

  The vertical sealing device 24 forms a vertical sealing area on the film F fed by the pull-down belt mechanism 23. More specifically, when the film F is sent by the pull-down belt mechanism 23, the vertical sealing device 24 seals both edges of the overlapped film F by, for example, fusion, so that both edges are sealed. A vertical seal region is formed.

  The horizontal sealing device 30 performs a seal region forming operation for forming a horizontal seal region (seal region) S on the film F fed by the pull-down belt mechanism 23.

  As shown in FIG. 2, the lateral sealing device 30 includes a pair of sealing jaws 31, a servo motor 32, and a crank mechanism 33. The seal jaw 31 is a member for sandwiching the film F. The pair of seal jaws 31 is provided with a heater (not shown). Note that a heater may be provided only on one of the pair of seal jaws 31. The servo motor 32 is fixed to the main body 30 a of the lateral seal device 30 via an attachment member 34. The rotation shaft of the servo motor 32 is connected to each of the plate material 35 and the plate material 36 via the crank mechanism 33. The plate member 35 is fixed to the support rod 37 at both ends thereof. The support rod 37 penetrates the plate material 36 at both end portions thereof, and is slidable along the extending direction of the support rod 37. The plate member 38 is fixed to the support rod 37 at both ends thereof. The support rod 37 penetrates a plurality of rod support portions 39 fixed to the main body 30a side so as to be slidable.

  In the horizontal sealing device 30 having the above-described configuration, when the plate member 36 and the plate member 38 are brought closer to each other by the rotation of the servo motor 32, the pair of seal jaws 31 are brought closer to each other (see FIG. 2A). Further, when the plate material 36 and the plate material 38 are separated from each other by the rotation of the servo motor 32, the pair of seal jaws 31 are separated from each other (see FIG. 2B). In a state where the pair of seal jaws 31 are close to each other, the film F in which the vertical seal region is formed is sandwiched in a direction crossing the feeding direction D, and the film F is fused to each other by the heat of the heater. That is, the horizontal sealing device 30 forms a horizontal sealing region S extending in the width direction of the film F (sealing region forming operation).

  The horizontal sealing device 30 further includes a cutter device 40. The cutter device 40 is attached to the plate member 38. The cutter device 40 includes a cutter 41 and a composite cylinder 42 in which, for example, a saw blade is formed. The cutter 41 is accommodated in the seal jaw 31 on the side opposite to the crank mechanism 33. For example, the cutter 41 is pressed against the film F by the composite cylinder 42 in a state where the pair of sealing jaws 31 sandwich the film F, thereby forming a cut C in the film F. Further, the cutter 41 is pressed more strongly against the film F by the composite cylinder 42, thereby cutting the film F. The cutter 41 separates the product G from the film F by, for example, cutting the film F after forming a plurality of continuous bags B and headers H.

  As shown in FIG. 3, the bag making and packaging machine 10 further includes a control unit 50. The control unit 50 includes a CPU (Central Processing Unit) 51 and a memory 52 including a ROM (Read Only Memory) and a RAM (Random Access Memory). The control unit 50 is electrically connected to each of the pull-down belt mechanism 23, the vertical sealing device 24, the horizontal sealing device 30, and the combination weighing device 100. For example, the control unit 50 reads a program stored in the ROM into the RAM and executes it by the CPU 51 to control at least the operation of the pull-down belt mechanism 23 and the operation of the lateral sealing device 30 (details will be described later). Here, the control unit 50 controls the operation of the pull-down belt mechanism 23 so that the feeding of the film F and the stopping of the film F are repeated, and performs a sealing region forming operation when the film F is stopped. In this way, the operation of the horizontal sealing device 30 is controlled. That is, the bag making and packaging machine 10 is configured as an intermittent bag making and packaging machine.

  In the memory 52, information used for manufacturing the product G is stored in advance. Information used for manufacturing the product G includes, for example, the number of bags B constituting the product G, the first distance L1, the second distance L2, the first period T1, the second period T2, the pull-down belt mechanism 23, and the horizontal seal. An operation pattern of the device 30 may be mentioned. The operation pattern of the pull-down belt mechanism 23 means a temporal transition of the feed or stop of the pull-down belt mechanism 23. The operation pattern of the horizontal sealing device 30 means a temporal transition of the operation or standby of the horizontal sealing device 30.

For example, the memory 52 stores a program in which these operation patterns are described.
The memory 52 includes, for example, an acceleration and a feeding period in which the pull-down belt mechanism 23 sends the film F, a stop period in which the pull-down belt mechanism 23 stops, and an acceleration and a pinching period in which the lateral sealing device 30 holds the film F (operation period). ), A standby period in which the horizontal sealing device 30 performs the seal region forming operation, and an acceleration and a release period (operation period) of the operation in which the horizontal sealing device 30 releases the film F are stored. Here, the acceleration is a time change rate of the operation speed. In the memory 52, when the film F is sent in each of the first period T1 and the second period T2, the acceleration at which the pull-down belt mechanism 23 sends the film F is stored as common acceleration data.

[Operation of the bag making and packaging machine 10]
Next, the manufacturing operation of the product G of the bag making and packaging machine 10 will be described with reference to FIGS. 4 and 5. As shown in FIG. 4A, it is assumed that the manufactured product G is separated from the film F by the cutter device 40. In this case, when forming the header H in the already manufactured product G, the horizontal seal region S1 that forms the bottom of the first bag B1 of the product G is formed.

[Formation of bag B]
As shown in FIG. 4B, the pull-down belt mechanism 23 feeds the film F by the first distance L1 in the feed direction D. At this time, the article A is supplied from the combination weighing device 100 to the bag B1. Thereafter, the horizontal sealing device 30 forms the horizontal sealing region S2 in the film F so as to be separated from the horizontal sealing region S1 in the feeding direction D by the first distance L1, and the cutter device 40 forms a cut C in the horizontal sealing region S2.

  More specifically, the control unit 50 controls the operation of the pull-down belt mechanism 23 with the operation pattern of the pull-down belt mechanism 23 as shown in FIG. 5A during the first period T1 from time t1 to time t2. To do. The first period T1 includes a feeding period a in which the pull-down belt mechanism 23 feeds the film F and a stop period b in which the pull-down belt mechanism 23 stops the film F. Moreover, the control part 50 controls operation | movement of the horizontal sealing apparatus 30 with the operation | movement pattern of the horizontal sealing apparatus 30 as shown to Fig.5 (a) during 1st period T1 from the time t1 to the time t2. The first period T1 includes a standby period e in which the horizontal sealing device 30 waits, a sandwiching period f in which the horizontal sealing device 30 sandwiches the film F, an operation period g in which the horizontal sealing device 30 performs a seal region forming operation, and a horizontal sealing A release period h during which the device 30 releases the film F.

  The control unit 50 controls the operation of the pull-down belt mechanism 23 so that the film F is fed by the first distance L1 in the film feeding direction D in the feeding period a. Specifically, the pull-down belt mechanism 23 starts feeding the film F at a predetermined first acceleration. The first acceleration is, for example, such that when the pull-down belt mechanism 23 presses the film F formed into a cylindrical shape against the tube 22b, the maximum acceleration is such that no slip occurs between the film F and the tube 22b. Acceleration set according to G. The pull-down belt mechanism 23 feeds the film F while maintaining the feeding speed of the film F for a certain time after the feeding speed of the film F reaches a predetermined feeding speed. The pull-down belt mechanism 23 decelerates the feeding of the film F at the first deceleration after the certain time has elapsed. The first deceleration is an acceleration having the same magnitude as the first acceleration and a negative sign. Thereafter, the control unit 50 controls the operation of the pull-down belt mechanism 23 to stop the film F in the stop period b. Therefore, the control unit 50 controls the operation of the pull-down belt mechanism 23 so that the feeding of the film F and the stopping of the film F are repeated.

  On the other hand, when the lateral sealing device 30 forms the lateral sealing region S2 on the film F so as to be separated from the first distance L1 in the feeding direction D, the control unit 50 performs the sealing region forming operation at intervals of the first period T1. In this way, the operation of the horizontal sealing device 30 is controlled. Specifically, the control unit 50 controls the operation of the horizontal sealing device 30 so that the horizontal sealing device 30 stands by during the standby period e. Here, as an example, the standby period e is a period equal to the sending period a. Therefore, when the film F fed as described above is stopped by the pull-down belt mechanism 23, the control unit 50 performs the horizontal sealing so that the pair of sealing jaws 31 of the horizontal sealing device 30 sandwich the film F in the clamping period f. The operation of the device 30 is controlled. In the lateral sealing device 30, the pair of sealing jaws 31 are brought close to each other.

  The control unit 50 controls the operation of the horizontal sealing device 30 so that the horizontal sealing device 30 performs the sealing region forming operation to form the horizontal sealing region S2 during the operation period g. In the horizontal sealing device 30, the horizontal sealing device 30 performs a seal region forming operation in a state where the pair of sealing jaws 31 sandwich the cylindrical film F in a direction intersecting the feeding direction. Here, as an example, the operation period g is a period included in the stop period b. That is, the control unit 50 controls the operation of the lateral sealing device 30 so that the sealing region forming operation is performed and the cut C is formed by the cutter device 40 when the film F is stopped. Therefore, the pull-down belt mechanism 23 continues to stop the feeding of the film F during the operation period g in which the lateral sealing device 30 performs the sealing region forming operation. As a result, the bag B1 is sealed, and a lateral seal region S that forms the bottom of the next bag B2 is formed. The control unit 50 controls the operation of the horizontal sealing device 30 so that the horizontal sealing device 30 releases the film F in the release period h. In the horizontal sealing device 30, the pair of sealing jaws 31 are separated from each other.

  As shown in FIG. 4C and FIG. 5A, the bag making and packaging machine 10 repeats the above-described operations in sequence, so that the horizontal seal is separated from each other in the film feeding direction D by the first distance L1. Regions S2 to S5 are formed, and four bags (bags B1 to B4) are continuously formed. Thereafter, the bag making and packaging machine 10 forms the header H after forming the bag B4.

[Formation of header H]
In order to form the header H, the pull-down belt mechanism 23 feeds the film F by a second distance L2 that is smaller than the first distance L1 in the feeding direction D. Thereafter, the lateral sealing device 30 forms the lateral sealing region S6 on the film F so as to be separated from the lateral sealing region S5 by the second distance L2 in the feeding direction D.

  More specifically, the control unit 50 controls the operation of the pull-down belt mechanism 23 so that the film F is fed by the second distance L2 in the feeding direction D during the second period T2 from time t5 to time t6. The second period T2 is a period shorter than the first period T1, and includes a feed period c in which the pull-down belt mechanism 23 feeds the film F and a stop period d in which the pull-down belt mechanism 23 stops the film F. Including. Further, the controller 50 forms the horizontal seal region S6 on the film F so as to be separated from the horizontal seal region S5 by the second distance L2 in the feed direction D during the second period T2 from time t5 to time t6. The operation of the sealing device 30 is controlled. The second period T2 includes a standby period i in which the horizontal sealing device 30 waits, a sandwiching period j in which the horizontal sealing device 30 sandwiches the film F, an operation period k in which the horizontal sealing device 30 performs a seal region forming operation, and a horizontal sealing A release period m during which the device 30 releases the film F.

  The control unit 50 controls the operation of the pull-down belt mechanism 23 so that the film F is fed by the second distance L2 in the film feeding direction D during the feeding period c. Specifically, the pull-down belt mechanism 23 starts feeding the film F at the first acceleration. The pull-down belt mechanism 23 decelerates the feeding of the film F at the first deceleration after feeding the film F at the first acceleration. Thereafter, the control unit 50 controls the operation of the pull-down belt mechanism 23 so as to stop the film F in the stop period d. Here, as an example, the stop period d is equal to the stop period b. Accordingly, the control unit 50 controls the operation of the pull-down belt mechanism 23 so that the feeding of the film F and the stopping of the film F are repeated also in the second period T2.

  On the other hand, the control unit 50 controls the operation of the horizontal sealing device 30 so that the horizontal sealing device 30 stands by during the standby period i. Here, as an example, the standby period e is a period equal to the sending period c. Therefore, when the film F fed as described above is stopped by the pull-down belt mechanism 23, the control unit 50 performs the horizontal sealing so that the pair of sealing jaws 31 of the horizontal sealing device 30 sandwich the film F in the clamping period j. The operation of the device 30 is controlled. In the lateral sealing device 30, the pair of sealing jaws 31 are brought close to each other. Here, as an example, the sandwiching period j is a period equal to the sandwiching period f.

  The controller 50 controls the operation of the horizontal sealing device 30 so that the horizontal sealing device 30 performs the sealing region forming operation and forms the horizontal sealing region S2 during the operation period k. In the horizontal sealing device 30, the horizontal sealing device 30 performs a seal region forming operation in a state where the pair of sealing jaws 31 sandwich the cylindrical film F in a direction intersecting the feeding direction. Here, as an example, the operation period k is a period included during the stop period d and is a period equal to the operation period g. That is, the control unit 50 controls the operation of the lateral sealing device 30 so that the sealing region forming operation is performed and the cut C is formed by the cutter device 40 when the film F is stopped. Therefore, the pull-down belt mechanism 23 continues to stop the feeding of the film F during the operation period g in which the lateral sealing device 30 performs the sealing region forming operation. Thereby, the header H is sealed, and a part of the lateral seal region S1 forming the bottom of the bag B1 of the next commodity G is formed. The control unit 50 controls the operation of the horizontal sealing device 30 so that the horizontal sealing device 30 releases the film F in the release period m. In the horizontal sealing device 30, the pair of sealing jaws 31 are separated from each other.

Thereby, the header H shorter than the bag B in the feeding direction D is formed on the film F.
Thereafter, as shown in FIG. 4D, the bag making and packaging machine 10 cuts the lateral seal region S <b> 6 with the cutter device 40 and separates the product G from the film F.

  In the bag making and packaging machine 10, the control unit 50 controls the operation of the pull-down belt mechanism 23 so that the feeding period c in the second period T2 is shorter than the feeding period a in the first period T1.

  Here, in the comparative example of FIG. 5B, when the header H is formed (the feeding period x in the second period T2), the feeding of the film F is started at the second acceleration. When the bag B1 to the bag B4 are formed (the second acceleration is an acceleration smaller than the first acceleration in the feeding period a in the first period T1. After the feeding speed of the film F reaches a predetermined feeding speed, the film The film F is fed while maintaining the feeding speed of F for a certain time, and then the feeding of the film F is decelerated by the second deceleration, which is equal to the second acceleration and has a negative sign. In this case, although the length of the header H along the feed direction D is shorter than the length of the bag B along the feed direction D, the period required to form each bag B and the header H The period required to form the is approximately the same.

  In this regard, in the bag making and packaging machine 10, when the film F is fed in each of the first period T1 and the second period T2, the control unit 50 pulls down the belt so that the film feeding is started at the same acceleration. The operation of the mechanism 23 is controlled. That is, in the bag making and packaging machine 10, as shown in FIG. 5A, when the header H is formed (the feeding period c in the second period T2), the magnitude of acceleration and the magnitude of deceleration, and the bag B1 -The magnitude of the acceleration and the magnitude of the deceleration in the case of forming the bag B4 (the feeding period a in the first period T1) are both the magnitudes of the first acceleration and are equal to each other. As a result, the time required for forming the header H (second period T2) is shorter than the time required for forming the bags B1 to B4 (first period T1).

  Further, the control unit 50 controls the operation of the lateral sealing device 30 so that the standby period i in the second period T2 is shorter than the standby period e in the first period T1. That is, in the bag making and packaging machine 10, as shown in FIG. 5A, the standby period y when the header H is formed is shorter than the standby period e when the bags B1 to B4 are formed. As a result, the time required for forming the header H (second period T2) is shorter than the time required for forming the bags B1 to B4 (first period T1). At this time, it is not necessary to shorten the operation period k during which the horizontal sealing device 30 performs the seal region forming operation in the second period T2.

[Action and effect]
As described above, in the bag making and packaging machine 10, the control unit 50 controls the operation of the lateral sealing device 30 so that the second period T2 is shorter than the first period T1, and thus the bag B in which the article A is accommodated. The formation time of the header H is shortened while the formation time of (bag B1-bag B4) is ensured. As a result, since the manufacturing time of the product (continuous packaging bag) G as a whole can be shortened, the manufacturing efficiency of the product (continuous packaging bag) G can be improved.

  The control unit 50 controls the operation of the pull-down belt mechanism 23 so that the feeding of the film F and the stopping of the film F are repeated, and when the film F is stopped, the horizontal sealing is performed so as to perform the sealing region forming operation. The operation of the device 30 is controlled. As a result, the seal area formation may be performed on the film F that is stopped. Therefore, it is possible to reliably form the seal region with a simple configuration.

  When the film F is fed in each of the first period T1 and the second period T2, the control unit 50 controls the operation of the pull-down belt mechanism 23 so that the feeding of the film F is started at the same first acceleration. . Thereby, since the setting of the acceleration for feeding the film F can be made common in the memory 52, the program in the control unit 50 can be simplified.

  In the bag making and packaging machine 10, in each of the first period T1 and the second period T2, the pull-down belt mechanism 23 feeds the film F, and the pull-down belt mechanism 23 stops the film F. Periods b and d. The controller 50 controls the operation of the pull-down belt mechanism 23 so that the feeding period c in the second period T2 is shorter than the feeding period a in the first period T1. Thereby, since it is not necessary to shorten the stop period d during which the pull-down belt mechanism 23 stops the film F in the second period T2, the second period T2 is shortened while maintaining the formation of the reliable lateral seal region S. Can do.

  In the bag making and packaging machine 10, during each of the first period T1 and the second period T2, the operation periods g and k in which the horizontal sealing device 30 performs the seal region forming operation and the standby periods e and i in which the horizontal sealing device 30 waits. And including. The control unit 50 controls the operation of the lateral sealing device 30 so that the standby period i in the second period T2 is shorter than the standby period e in the first period T1. Thereby, since it is not necessary to shorten the operation period k in which the lateral seal device 30 performs the seal region forming operation in the second period T2, the second period T2 can be shortened while maintaining the reliable formation of the lateral seal region S. Can do.

  In addition, the operation rate of the bag making packaging machine 10 can be mentioned as manufacturing efficiency of a continuous packaging bag, for example. The operating rate of the bag making and packaging machine 10 is represented by, for example, a value obtained by dividing the number of formed bags B including the article A by the time required to manufacture the product G. In this case, the bag making and packaging machine 10 forms the header H that does not include the article A without changing the number of the bags B that include the article A and the time required to form the bag B that includes the article A. Since the time required to manufacture the product G can be shortened by reducing the time required for the bag making and packaging, the operating rate of the bag making and packaging machine 10 can be improved.

[Modification]
In the above embodiment, the bag making and packaging machine 10 is configured as an intermittent bag making and packaging machine that performs a seal region forming operation when the film is stopped. It may be a continuous bag making and packaging machine that performs a seal region forming operation.

  In the above embodiment, the feeding periods a and c in which the pull-down belt mechanism 23 feeds the film F, the sandwiching periods f and j in which the lateral sealing device 30 sandwiches the film F, and the releasing period in which the lateral sealing device 30 releases the film F. Although the example of operation | movement of the bag making packaging machine 10 in which h and m do not mutually overlap was demonstrated, the bag making packaging machine in which these overlap may be sufficient.

  When the film is fed in each of the first period T1 and the second period T2, the control unit 50 controls the operation of the film feeding unit so that the film feeding is started at the same acceleration. It is not limited. For example, the magnitude of acceleration when the film is fed in the second period T2 may be any magnitude that is greater than the acceleration in the comparative example of FIG. In short, the control unit 50 may control the operation of the pull-down belt mechanism 23 so that the feeding period c in the second period T2 is shorter than the feeding period a in the first period T1.

  In the above embodiment, the continuous packaging system 1 including the combination weighing device 100 has been described as an example, but the combination weighing device 100 is not necessarily required. The supply of the article A does not necessarily need to use the combination weighing device 100, and may be a conveyor or the like, for example.

  DESCRIPTION OF SYMBOLS 10 ... Bag making packaging machine, 23 ... Pull-down belt mechanism (film feeding part), 30 ... Horizontal sealing apparatus (sealing area formation part), 50 ... Control part, A ... Article, B ... Bag, F ... Film, G ... Goods (Continuous bag), H ... header, S ... horizontal seal area (seal area).

Claims (5)

A bag making and packaging machine for manufacturing a continuous bag having a plurality of bags containing articles and a header,
A film feed section for feeding a tubular film;
A seal region forming unit for performing a seal region forming operation for forming a seal region on the film fed by the film feeding unit;
A control unit for controlling the operation of the film feeding unit and the operation of the seal region forming unit,
The seal region forming part is
The bag is formed in the film by forming the seal region in the film so as to be separated by a first distance in the feeding direction of the film,
Forming the header in the film by forming the sealing region in the film so as to be separated by a second distance shorter than the first distance in the feeding direction;
The controller is
In the case of forming the seal region on the film so as to be separated from the first distance in the feeding direction, the operation of the seal region forming unit is controlled so as to perform the seal region forming operation at intervals of a first period,
When forming the sealing region on the film so as to be separated from the second distance in the feeding direction, the sealing region is formed so that the sealing region forming operation is performed at an interval of a second period shorter than the first period. A bag making and packaging machine that controls the operation of parts. The controller is
Controlling the operation of the film feeding section so that the feeding of the film and the stopping of the film are repeated,
The bag making and packaging machine according to claim 1, wherein when the film is stopped, the operation of the seal region forming unit is controlled to perform the seal region forming operation.   The control unit controls the operation of the film feeding unit so that the feeding of the film is started at an equal acceleration when the film is fed in each of the first period and the second period. Item 3. A bag making and packaging machine according to item 2. Each of the first period and the second period includes a feeding period in which the film feeding unit feeds the film, and a stopping period in which the film feeding unit stops the film,
The bag making and packaging machine according to claim 2 or 3, wherein the control unit controls the operation of the film feeding unit so that the feeding period in the second period is shorter than the feeding period in the first period. . Each of the first period and the second period includes an operation period in which the seal region forming unit performs the seal region forming operation, and a standby period in which the seal region forming unit waits,
5. The control unit according to claim 2, wherein the control unit controls the operation of the seal region forming unit so that the standby period in the second period is shorter than the standby period in the first period. The bag making and packaging machine described.

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